Improvement in lanterns



NITED STATES PATENT QFFICE.

JOHN II. IRWIN, OF PHILADELPHIA, PENNSYLVANIA.

A IMPROVEMENT IN LANTERNS.

Specification forming part of Letters Patent No. 99,442, dated February 1, 1870.

To all whom it may concern:

Be it known that I, JOHN H. IRWIN, of Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented a new and useful Improvement in Lanterns 5 and I do hereby declare the following to be a full, clear, and eXact description of the same, reference being had to the accompanying drawings, and the letters and figures marked thereon, which forni a part of this specification, and in which- Figure l represents a side elevation of my improved lantern, with oneV of the tubes cut away at the base to show how it is joined to the lantern and Fig. 2 is a vertical sectional view, taken at the line in Fig. 1.

The object of this invention is to improve upon my tubular lantern heretofore patented, as regards simplicity and cheapness, so as to be able to meet any demands there may be for a cheap lantern; and I have also attached a thumb-piece to the movable top of the lany tern, to facilitate raising it to remove the globe or glass.

The nature of my invention consists in inserting the air-tubes C into the top of the airspace B, thereby effecting a great reduction in cost of manufacture by avoiding the use of elbows at the lower ends of said tubes; and it further consists in the thumb-piece for moving the top glass or globe-holder, hereinafter fully described.

In the annexed drawings, A represents the oil-pot, and B an air-chamber on the top of the oil-pot, which serves the double purpose of keeping the oil in the oil-pot cool, though near the flame, and also to receive air from the airtubes C and conduct it to the burner. By extending the air-tubes G directly into the airchamber B the elbow usually use-d at the bottom of said air-tubes is dispensed with.

I) is a perforated disk, with its edge turned up to receive the glass or globe E, and rests on the cone, as clearly shown in the drawings. The glass or globe E is held at the top by the open adjustable globe-holder F, which is held pressed down upon the top of the globe by the spring H.

There is a wire, I, attached to the adjustable globe-holder F, and extending up through the guides J to a convenient place for the operator to seize it with the thumb or one of the fingers of his hand with which he holds the lantern, and raise it to the position indicated by the dotted lines in Fig. 1, thereby raising the globe-holder F from the top of the globe, so that it can be readily removed from. the lantern.k

The globe-holder F, in the annexed drawing, is suspended from the inverted-saucershaped air-gatherer P,which is raised and lowered with the globe-holder F, and the spring H and thumb-piece I are connected directly with it-the air-gatherer-and only indirectly with the globe-holder; but the prime object of the adjustability is to move the globeholder for the purpose of removing the globe, as above described.

I do not desire to limit myself to the precise construction and arran gement of the wire or rod I, as it will be readily seen that any light wire or strip of metal extending up from the globeholder F to a position where it would be sufticiently removed from the heat of the lamp to be always cool, and where it could be conveniently reached to raise the globe-holder, would serve every purpose, and it may be attached directly to the globe-holder, so as to move that without the air-gatherer; but I deem the form shown in the annexed drawings the simplest and best, as it is kept well in place by the guides J.

The currents of air passing through this lantern are the same as in my tubular lanterns heretofore patented, and need not be described here; nor do I claim anything new in the construction of the cone or burner 5 but What I do claim as new, and desire to se- J. n. IRWIN. [L s] Witnesses l' FRANCIS S. Bonn, WM. T. FARNHAM. 

